Github user nsyca commented on a diff in the pull request:
https://github.com/apache/spark/pull/17520#discussion_r109522412
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -1032,6 +1248,109 @@ object PushPredicateThroughJoin extends
Rule[LogicalPlan] with PredicateHelper {
}
/**
+ * Pushes down a subquery, in the form of [[Join LeftSemi/LeftAnti]]
operator
+ * to the left or right side of a join below.
+ */
+object PushLeftSemiLeftAntiThroughJoin extends Rule[LogicalPlan] with
PredicateHelper {
--- End diff --
Pushing down LeftSemi/LeftAnti through a join is better done as part of the
cost-based join reordering. This code is put here to preserve the existing
behaviour.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
